Home / 7,815.40-10,782.57-4,455.79

Finding the Fourth Proportional to 7,815.40, 10,782.57 and 4,455.79

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Solution

The fourth proportional to 7,815.40, 10,782.57 and 4,455.79 is: 6,147.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.40 : 10,782.57 = 4,455.79 : x
  2. Step 2: Convert to fraction form
    7,815.40/10,782.57 = 4,455.79/x
  3. Step 3: Cross multiply
    7,815.40x = 10,782.57 × 4,455.79
  4. Step 4: Simplify right side
    7,815.40x = 48,044,840.62
  5. Step 5: Solve for x
    x = 48,044,840.62/7,815.40
  6. Step 6: Final answer
    x = 6,147.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.